Automatic calendar



11611.19, 1922 1,439,120. 1. F. nAnTKE.

AUTOMATIC CALENDAR.

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1,439,120 .l. F. RADTKE.

AUTOMATIC CALENDAR.

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18 Y Z6 go 12 3o@ 29a 26a 16% Patented Dec. 19, 1922.

UNITED STATES PATENT OFFICE.

JULIUS F. RADTKE, OF CHICAGO, ILLINOIS.

AUTOMATIC CALENDAR.

To all whom t may concern.'

Be it known that I, JULrUs F. RADTKE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful 'fmprovements in Automatic Calendars, of which the following is a specificationA This invention relates to clocks having calendar' attachments which are driven by the clock train, the attachments being endless belts bearing the names of the days of the week, the names of the months, and the numbers of the days of the month, said belts being shifted at the proper time to display a new inscription.

The invention has for its object to pron vide a calendar of the kind stated embodying certain novel and improved features of construction and modes of operation to be hereinafter described and claimed, and in or der that the same may be better understood, reference is had to the accompanying drawings, wherein:

Figure 1 is an elevation of the clock; Fig. 2 is a plan view of the calendar mechanism; Fig. 3 is a cross-section on the line 3-3 of Fig. 2; Fig. 4 is a cross-section on the line 4 4 of Fig. 2; Fig. 5 is an enlarged plan. view of certain parts shown in Fig. 2; Fig. 6 is an enlarged elevation of a pawl-andratchet mechanism, and Fig. 7 is a similar view showing the parts in another position.

Referring specifically to the drawings. 10 denotes a clock of conventional design. The clock case has a bottom compartment 11 which contains the calendar attachment, the face or front wall of said compartment having a display openingr 12 through which are exposed for display the inscriptions on endless belts 13, 14 and 15, respectively. The belt 13 bears the names of the days of the week, the belt 14 the names of the months, and the belt 15 bears the numbers of the days of the mont-h. The belts are arranged in. vertically spaced relation, and the width of the opening 12 is such. that only one of the inscriptions is displayed at one time. The belts are shifted at the proper time to display the correct date, etc.

The belt 13 is trained over rollers 16 and 16, the belt 14 over rollers 17 and 17, and the belt 15 over rollers 18 and 18. Rollers 16, 17 and 18 are loose on a shaft 19, and rollers 16a, 17EL and 18a are loose on a shaft 19a. The shafts 19 and 19a are stationary, they being suitably supported by top and bottom frame members 20 and 2Oa in the compartment 11.

Pawl-and-ratchet devices are provided for periodically operating the rollers to feed the belts. The devices for the rollers 16 will be described first.

On one end of roller 16 is fastened a ratchet wheel 21 and on the corresponding end of roller 16aL is fastened a ratchet wheel 21. A feed pawl 22 is engageable with the ratchet wheel 21, and the ratchet wheel 21a is engageable by a feed pawl 22a. Pawls 22 and 22 are operated at the end of each day to turn the rollers 16 and 16a a distance to feed the belt 13 past the display opening 12 and display thereat the name of.

the next day. The pawl 22 is operated by a gear wheel 23, and pawl 22a is operated by a gear wheel 23a. Gear wheel 23 has a side lug 24 and gear wheel 23a has a side lug 24a. Between gears 23 and 23a, and in mesh therewith, is a gear wheel 25 which is fastened to a shaft 26 obtaining motion from the clock train, preferably some element thereof which will cause said shaft to make one complete revolution each day. It will therefore be evident that, through the gears 25, 23 and 23a, and the pawl-andratchet mechanism, the belt 13 is advanced at the close of the day a distance to display the name of the next day.

The gear wheels 23 and 23a are fast on shafts 27 and 27 supported by the frame members 20 and 20a.

The belt 15 must also be advanced at the close ofv each day to display the new date, and hence the driving means may be the same as that employed for the belt 13. T he roller 18 is therefore equipped with aratchet wheel 2S engageable by a pawl 29, and the roller 18a has a ratchet wheel 28 engageable by a pawl 29a. r1`he pawl 29has a laterally extending arm 30 which is in .the path of a lug 31 on one side of a wheel 32 fast on shaft 27. The pawl 29a has a laterally eX- tending arm 30 which is in the path of a lug 31 on one side of a wheel 32a fast on shaft 27a. A second set of gear wheels 33,

33' and 33", similar to the gear wheels 23 and 25 and 2." may also be provided for tansmittingv the motion of shaft 2G to the shafts 2T and 27a. The pnivl 29 has a longitudinal slot 34;, throui'g'h which entends a supporting rod `lor the paivl, said rod extending between and being carried by the frame members 2O and 20a. ln the slot 34:, between the rod 35 and the remote end of the slot, is located a coiled spring 36. When the lug 3l reaches the paivl arm 30, the pawl 29 is made to move backwards over a certain number oi teeth of' the ratchet Wheel 28, this movement ofthe pawl placing` the spring 36 under compression. Wlien lug; 3l. slips oit arm 30, the pavvl is advanced by the spring 3 the distance it was retracted, and the pointed end ot the pavvl non7 engages one oil-'the teeth of the ratchet Wheel 28, thereby rotating the same and the roller 18 to iced the belt l5. The pawl 29a, as Well as the parvis 22 and 22u are all operated in this manner, and hence the foregoing description of the operation of pawl 29 is sutficient.

rihe rollers 17 and 17 are also operated by a pawland-ratchet merifhanism, the ratchet wheels being shown at 3i and 37, and the paWls at 351i and 3811. is the belt let is to be shifted only at the end ol" a month, the paivl 38 is operated by side lugs 39 on a gear wheel l() loose on shaft 27 and obtaining` motion from shaft 26 through a suitable train. oli red[icingl gears as iovvn in Fig. 2. The pawl 38 is operated by side lugs 391% on a Wheel 40u' loose on shaft 2, and also obtaining motion from the aforementioned train of reducing gears The paWls 38 andv 38a are supported and operated in the same manner as the pawl E39.

The gear wheels d() and l0 are designed to be given one revolution per year, and twelve properly spaced lugs 39 and 39 are provided, so that the rollers 17 and 17 may be given a step-by-step rotary movement to advance the belt let twelve times per year7 or one step at the end o'l.E every month to dis'- play a nenY inscription. l'lmvever as the number ci days` Ae not the toi i months, a mechaj smhas been provi shifting the datebelt l5 throf one day that ther months ot oril, June, September andV lil'ovember lacie, and spam. oiathree days that the month of leliiruar; la For this purpose there is mounted bo- -i the paivl Q9 and the ,gear wheel 25') a trip member t'i' which is normally positioned to trip the pawl i9 oli? the teeth of the ratchet Wheel 28 on the backward stroke of said pavrl, so that the pavvl, on its workingstrole, can move the ratchet Wheel 28; only a distance corresponding` to the number o teeth over which it had slipped on thel backward stroke.l rli'he parts-are so designedthat this 'will be displayed.

distance moves the belt l5 the correct dis tance to display the next date. lf now, the member Lil is moved in the direction the paWl moves on the backward stroke, a larger number of ratchet teeth Will be exposed, so that the paivl, on its Working; strohe will turn the ratchet Wheel a correspondingly greater distance. At the end oi the month of February, the member el will be shifted to give the paWl a stroke long` enough to turn the ratchet Wheel 28 a suliicient distance to advance the belt so that the numeral l For the thirty day months, the member di is shifted to allow the pavvl-andratchet mechanism, at the end of the thirtieth day, to advance Jhe belt so that the numeral l will be displayed.

rthe shitting of the member Lil is automatically eftected by providing,` the same with a projecting` arm which is in the path of lugs i3 on the Wheel i0 on the side opposite the one carrying the lugs 39. These lugs are so spaced vangularly as to come into action at the proper time.

rlhe member fil is supported by rods 44 passing through a slot i5 in the rear end ot said member, and a slot in a lateral exte, sion ci? the arm Springs t8 in the slots and lo restore the member @el to its normal position after the lugs e3 slip oli the it will be noted in l that one oil: the ings t3 is longer than the others, this being tor the purpose ot olitaining,V the maxi linnn amount ol retraction oit the member il necessary tor the month oi February.

it. pand-tripping mechanism as hereinbe- 'fore described is of course also provided tor the pavvl 29a.

l'. claim:

l. il calendar clock comprisingA endless I belts bearingsinscrlptirms denoting days, dates and the names of the months, respcctively, rollers or r which the belts are trained, ratchet Wheels for rotating the rollers, parvis `for actuating` the ratchet wheels, clock-train driven rotatable members havingn lugs for engaging the pawls to actnate the saine, the parvis associated with belt :and

n. calendar clock con iynisirrrgv endless belts bearing; inscriptions denoting days,

dates and the names ot the months, respcctively,A rollers over which. the belts are trained, ratchet Wheels for rotating the rollers, parvis for actuating,` the ratchet Wheels, cl0ch-tram driven rotatable memi i bers having lugs ior engaging the paWls to i ff o actua te the same, the pawls associated with tance, and lugson the rotatable member asthe days nml (lates belts being actuated daily, ,soeiuted with the pawl of the months belt, and the pewls associated with the months into the path oit' which lugs the trip member` l() belts being actuated monthly, a trip memextends for actuation thereby.

g bei' in the path of the pawl of the dates belt In testimony whereof I anni my signature.

and movable for varying the stroke of Said pawl for shifting the dates belt an extra ds- JULIUS F. RADTKE. 

